Lock



Patented Dec. 2, 1924,

NORMAN B. HURD, 0F NEW BRITAIN, CONNECTICUT, ASSIG-NOR TOY THE AMERICAN HARDWARE CORPORATION, OF ERTAI CONNECTICUT, Al CORPORATION OF CONNECTICUT.

LOCK.

Application filed March 26, 1924. Serial. No. 701,982.

To all whom t may concerne.'

Beit known that I, NORMAN B. HURD, a citizen of the United States of America, residing at New Britain, Connecticut, have invented a new and useful Lock, of which the following is a specification.

My invention relates to a lock.

It is at the present time common practice to provide a lock with a stop action for locking one of the thumb pieces or other latch actuators so that the latch can be operated from only one side, that is to say, the stop action is so arranged that when in one. positionthe outside thumb ieee or other actuator willbe dogged, sot at the latch cannot be operated from the outside butcan be retracted from the inside of the door.

When such a lock is to be put on the opposite door, what was formerly the inside of the lock would then become the outside, and some rearrangement is necessary to enable the then outside thumb piece to be dogged, to prevent operating the latch from the then outside. j

lt is the general object of my invention to provide a lock which may be used on either a right ora left hand4 door, and theV latch dogged from the outside in either case.

Itis another object to provide a lock having simplified' clogging means for dogging the latch from either side of thev lock. t

It is a more specific object to provide a locking dog, which, by asimpleY reversal", may be caused to dog a latch from either side of the lock.

Briefly stated, the invention in its preferred form includes alock which may be of a conventional type and including a latch to be operated by' means on both the inside and the outside of a door. A locking dog is placed in the path of one ofthe latch `retracting means, and may be locked in that position by means of a stop action,so as to prevent actuation of the latch from the outside of the door. The locking dog is of such form that vupon a merek reversal of that part it will come in the path, of the other latch actuator and may be locked in that osition, so as to prevent actuation of the late bythe last actuator. Y

In the drawings, which show, for illustrative purposes only, a preferred form of the invention y Fig. l is' a fragmentary view of the' outside o'f a left-hand' door with" a lock applied thereto, parts being broken away to illustrate features of the invention;

Fig. 2 is a fragmentary view of the features shown in Fig. l, looking upwardly;

Fig. 3 is a sectional view of parts shown in Fig, l as viewed from the left in Fig. l;

Fig. l is a detail view of parts shown in Fig. l but differently arranged;

Fig. 5 isa perspective view of an improved locling dog.

The lock'l is applied to a door, and in the formshown the lock is reversible, so that the same may be applied to either a right or a left hand door. The lock is provided with the usual locking bolt and mechanism (not shown) for actuating the same by means of a key. 2 indicates a conventional type of latch urged to theoutward position by means of a spring 3, interposed between the latch case and a head 4 on .the latch. bolt. A latch lever 5 in the preferred from is pivoted on a pin` 6 in the casing, and the end 7 engages the latch bolt so as to retract the latch. When the lock is arranged for actuation by thumbl pieces, the latter are usually arranged at a point beneath the lock. In the form shown the conventional thumb rpieces 8 9 are' pivoted, respectively, at lO-ll, and the inner ends 12-l3, respectively, which may be termed thumb levers, extend to points beneath the lower end yof thelatch lever 5. It will now be clear from Figs. l. and 3 that,

upon depressing either of the thumb pieces 8 or 9, one of the' thumb levers l2 or 13, depending upon which thumb p'iece is depressed, willv rock the latch lever 5 about its pivot pin 6, and the extreme end 7 will retract the latch 2.

As has been statedlabove, it is desirable to dog the outside thumb piece or thumb lever so that it will be impossible to open the door by depressing the outside thumb piece. In the form; shown I provide what may be termed a locking dog l5, which if desired may be pivoted on the pin 6. The locking dog has two projecting portions 16-17 at opposite sid'esthereof, and these projections are offset relatively to each other. While these projections may truly be termedprojections it would be equally as well toydefine same by stating that the` locking dog is provided with cutaway portions I8, 19 which are' offset relatively toeacl other,

When the locking dogmis arrangedin the position shown in Figi, 1,t @projection 17 extends do-Wn to the plane of the lower end of the latch lever 5, While the cut-away portion 13 is raised considerably above the lower end of the lever lt will thus be clear that if the latch dog 15 is locked in the position shown in Fig. 1, the thumb lever 13 extending,` beneath both the latch lever and the locking' dog,- 15 cannot be raised to actuate the latch. lVith the loching` dog in the position shown in Fig. l. it Will be equally clear that. the same Will have no eect upon the thumb lever 12 on the inside of the door which vvill be free to actuate the latch 2. Means must therefore be provided for clogging or holding the locking dog 15 in the position shown in Fig. 1. The means which l employ may be a stop action, including` the usual push buttons 20e-21, carrying tjhe inner extensions, which are caused to move in predetermined fashion by the link or connecting lever 22 on the interior of the lock case. A suitable snap action means, such as the spring 23, serves to hold either of the push buttons in depressed position. The extreme end of one of the extensions, in the present case the extension 24C on the push button 21, extends, When the push button 21 is depressed, into the path of the end 25 of the locking dog' 15. When the push button 21 is depressed, the end 2li Will serve to effectively lock the locking dog in the position shown in Fig. 1. `When the push button 2O is depressed, the end 24C Will be Withdrawn from the path of movementof Jthe end 25 of the locking dog, and the same ivill then, of course, be free to move. With the parts arranged as shown in Fie'. 1, therefore, the outside thumb piece 9 and its corresponding` thumb lever 13 Would be effectively dogged, so that it would be inipossible to depress the thumb piece 9 so as to cause the lever 13 to retract the latch 2. rlhe inner thumb piece 8 and its correspondn ingr lever 12, due to the cutaway portion 18, will be free to act upon the lower end of the latch lever 5, so as to retract the latch 2.

Now, when it is desired to use the lock on a right hand door, it is necessary to reverse the latch 2, as in all locks of this character, and it is also necessary to reverse the cylinder portion of the lock. NOW, in order to permit the thumb piece 8, which Would then be the outside thumb piece, to be dogged so as to prevent actuation of the latch 2 from the outside, it is onlv necessary to lift the locking dog 15 olf of the pinv 6 and reverse the same and replace it upon the pin. This reversed position is shovvn in. Fig. 4t. Now, since the projection 16 eX- tends down adjacent the lovver end of the latch lever 5 and directly in the path of the thumb lever 12 carried by the thumb piece 8, when the push button 21. is de pressed, so as to be in the position shown in Fig. 1, it will be clear that the thumb piece 8, which 1s noiv on the outside, will he effectively dogged, so as to prevent retraction of the latch 2 from the outside of the door. lhen the button 20 is de pressed, the end extension 24: is Withdrawn and, of course, the latch. may then be rctracted by depressing' either thumb piece.

The locking` dog' which, by a simple re versal, may serve to lock either latch actuator so that the lock may be used on either a right-hand or a left-hand door, constitutes the principal feature of my invention. Other devices are now known for rearrangino; locks so that the same may be used on either right or left hand doors, but With all of the arrangements with which ll am familiar there are several parts which must be adjusted and rearranged, and all lack the simplicity so characteristic of my present invention.

lJVhile l have disclosed a preferred form of the invention, l do not Wish to be limited to the form shovvn since changes may be made Within the scope of my invention as defined in the appended claims.

l claim.:

1. n a lock, a latch, separate means at opposite sides of said lock for retractingj said latch, a single reversible locking dog havingblocking means to be positioned in the path of one or the other' of said retracting;-

means depending upon the mounted position of said dog, and means for locking said lockingdoe: whereby said latch Will be locked against retraction by one of said means.

2. ln a lock having a latch and a latch lever for actuating the same, said latch lever beinfr pivoted in the lock case, a pair of thumb levers for retracting .said latch, a single reversible locking dog adjacent said latch lever` said lockingdop; having a part to be engaged by one of said thumb levers When mounted in one position, and another part to be engaged by the other of said thumb levers When mounted in another position, and a stop action for locking said locking' dog'.

3. lln a lock including a latch, a pivoted latch lever for actuating the same, a single reversible lockingl dos' pivoted With said latch lever. a pair of thumb levers for actuating.' said latch lever. said locking, dog havinfr a part extending into the path of one of said thumb levers when mounted in one position, and when reversed having; a part eirtendinp; into the path of the other thumb lever, and means for locking said loclzinfr doe'.

4. lin a lock including' a latch. a latch lever for actuating' the same, a lockingdos," having two projecting; lugs. one at each side thereof, a pair of thumb levers for actuatllt) ing said latch lever, one of the projections on said locking dog lying in the path of movement of one of said thumb levers when the locking dog is in one position, and the other projection lying in the path of the other thumb lever when the locking dog is in reversed position, and a stop action for locking said locking dog whereby either of said thumb levers may be prevented from actuating said latch lever.

5. In a lock, a latch, a latch lever fon actuating the same, a pivot pin for pivoting the latch lever' in the lock case, a locking dog pivoted on said pin With said latch lever, a pair 0I" thumb levers for actuating said latch lever, said locking dog having a part extending into the path of each of said thumb levers, depending upon the position of said locking dog, and stop action means for locking said locking dog whereby either of said thumb levers may be prevented from actuating said latch lever.

6. As an article of manufacture, a locking dog for the purpose herein described, comprising a plate having a project-ion at each side thereof, said projections being offset relatively to each other.

7. As an article of manufacture, a locking dog for the purpose herein described, comprising a plate having a cutaway portion at each side, said cutaway portions being offset relatively to each other.

NORMAN B. HURD. 

